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Finding the Fourth Proportional to 116,916, 161,344.14 and 66,615

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Solution

The fourth proportional to 116,916, 161,344.14 and 66,615 is: 91,928.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,916 : 161,344.14 = 66,615 : x
  2. Step 2: Convert to fraction form
    116,916/161,344.14 = 66,615/x
  3. Step 3: Cross multiply
    116,916x = 161,344.14 × 66,615
  4. Step 4: Simplify right side
    116,916x = 10,747,939,886.10
  5. Step 5: Solve for x
    x = 10,747,939,886.10/116,916
  6. Step 6: Final answer
    x = 91,928.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.